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Unread 08-30-2009, 11:43 PM   #1
Shawn94
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1998 TJ Wrangler 
 
Join Date: Apr 2009
Location: S.E., MI
Posts: 229
94 2.5 engine pulsing?

My engine revs up and down while driving for about 30 seconds, then runs normal. This happens about every 5 - 10 minutes at random. It also idles normal.

Any ideas?

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Unread 08-31-2009, 07:57 AM   #2
idaholtby
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1991 YJ Wrangler 
 
Join Date: Apr 2008
Location: Meridian, Idaho
Posts: 2,554
If you don't have any codes to point you in a course of action, then I would first look for vacuum leaks and then give the throttle body and IAC a good cleaning. Remove the TB and get a new mounting gasket. Clean the bore and IAC housing thoroughly with carb cleaner and see how she does.
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